一种多通道数据流直接数字频率合成器

摘要

采用0.13 μm工艺,设计了一种10 bit精度、无杂散动态范围(SFDR)为54 dBc、最大工作频率达到1.2 GHz的直接数字频率合成器DDFS.采用多通道数据流结构,提高了工作频率;利用QLA技术对ROM查询表进行了优化,压缩了ROM查询表的大小,提高了频谱纯度.%This work has been implemented in 0.13 (Am CMOS technology, the direct digital frequency synthesis has a resolution of 10 bits with a measured SFDR 54 dBc. Its maximum operating frequency is 1.2 GHz. To improve the working frequency and spectral purity,MUX structure has been used, and an original quarter ROMs structure is brought forward and implemented by QLA technique.